Hair-dye.



H. RIOHEZ.

HAIR DYE.

APPLICATION FILED 00131, 1911.

Patented Mar. 11, 1913.

HIPPOLYTE Rl'CII BIZ, O'E ENGrHIEN-LES-BAINS, FRANCE.

HAIR-DYE.

Specification of Letters Patent.

Application filed October 31, 1911. Serial No. 657,740.

To all whom it may concern Be it l-uown that. I, HirroLr'rn Rionnz, a citizen of the Republic of France, and resi dent of Enghicn-les-Bains, Seine-et-()ise,

France, have invented improvements in Hair-Dyes, of which the following is a full, clear, and exact description.

The object of the prcscntinvention is a dyeing cosmetic, made of superposed layers.

containing products separately placed, so as to re-act on one another, thus producing the color of the hair or heard at the moment of a 'n'ilicution to these.

Let us take for instance pyrogallic acid and a soluble salt of silver. If we put a solution of these two products into any mire ture of grease which canhe run into the form of a cosmetic, it naturally results that. the reaction by contact will take place, and

that a dull precipitate incapable of dyeing will beproduced. The result will be quite diil'erent if we proceed as follows: Instead of putting the two products together into the same hath of grease, two ditl'erent solutions are formed of the said grease. In one, we put the pyrogadlic solution, and in the other, the solution of the salt of silver. After having carefully stirred the first solution to obtain a homogeneous amalgam, a

0 small layer of this'amalgam is poured into a small mold for this purpose, and it is allowed to stifi'en by cooling. The same proreading is followed with the silver composition which has also been, well made homo- 3 geneous, and on the firstlaycr of the pyrogallic composition, wheu'it is cool and solid, at similar layer of the silver composition is poured, which also becomes solid hy cooling. In this way as many layers as are necessary 40 of the products are poured in and thus we have a cosmetic of superposed layers, the constituent elements of which cannot react upon one another, because they are tixed and sheathed, so to speak, in the cold grease.

As an example, one solution might consist of 20 grams of grease and *l grams of the soluble salt of silver (as nitrate of silver) dissolved in 2 grams of boiling water. The other solution might consist of 20 grams of grcase and 2 grams of pyrogallic acid, the latter being, if desired, dissolved in afew drops of water before heing mixed with the grease. The above proportions may, 0

Patented Mar. 11, 1913.

course, be varied according to the diil'erent' shades which it may he desired to impart to the hair.

The phenrmienon which is produced at. the moment of dyeing the board or the hair is easily umlerstood. As in the case of the ordinary cosu'letic, the dyeing cosmetic is ruhhed on the hair follicle, which is thus impregnated with the two elements which are very much divided from one another. As a result of the contact, the reaction-is produced in the initial state, that is to say, in its greatest strength, and it thus gives to the hair or heard which is impregnated with it, a veritable and solid dye, while the cosmetic itself remains constantly inert, viz, stable. It is evident that this manner of proceeding can be applied to all products with reciprocal action, capableof dyeing the hair or heard.

In the drawing, section of the article emhodyiu my invention. Fig. 2 is a horizontal section through Fig. 1. r

In the drawing I show two superposed layers,:t'or instance, one of said layers, comprising a grease and soluble salt of silver, and the other layer and pyrogallic acid.

Claim- 'A preparation for of superposed solid layers, era comprises a grease and dyeing hair consisting one of which laysoluhle salt of silver and the other layer comprising grease and pyrogallic acid.

In testimony whereof I aflix my signature in presence of two witnesses. HIPPOLYTE RICHEZ. Witnesses EDMOND LECON'IURIER, I-I.'C. Goxn.

Figure 1 shows a vertical 2 comprising grease 

